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A method of preparing lithium battery anode material by using calcined organic silicide

A lithium battery anode, organic silicide technology, applied in battery electrodes, circuits, electrical components, etc., to achieve the effects of low raw material prices, good application prospects, and good cycle stability

Inactive Publication Date: 2020-09-15
HEBEI NORMAL UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Literature research shows that there is no report on the use of direct calcination of organosilicides to prepare lithium battery anode materials

Method used

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  • A method of preparing lithium battery anode material by using calcined organic silicide
  • A method of preparing lithium battery anode material by using calcined organic silicide
  • A method of preparing lithium battery anode material by using calcined organic silicide

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0018] Select trimethylsilanol as the raw material, measure 30 mL of the material, place it in a porcelain crucible, and put it into a muffle furnace for calcination at 450° C. for 2 h. Weigh the calcined upper white substance and grind it for 20 minutes to obtain the product, which is called active substance.

[0019] After weighing the active substance, acetylene black and polyvinylidene fluoride according to the mass ratio of 8:1:1, put them in an agate mortar, stir and grind them evenly, then add a few drops of N-methylpyrrolidone, and continue to fully Stir to form a homogeneous slurry. Then use a glass sheet to evenly press and spread the slurry on the copper foil, and then put it into a vacuum drying oven to evacuate and dry at 120° C. for 12 hours. After cooling down, it is used as the positive electrode of the battery. Then take the lithium sheet as the negative electrode, use polypropylene 2400 as the separator, and use 1mol / L LiPF in organic solvent 6 As the elec...

Embodiment 2

[0025] Hexamethyldisiloxane was selected as the raw material, 30 mL of the raw material was measured and placed in a porcelain crucible, and put into a muffle furnace for calcination at 600° C. for 2.5 h. The calcined upper white substance was weighed and ground for 20 minutes, and the obtained substance was the active substance. The test method of the assembled battery is the same as that of Example 1. It is confirmed that the prepared material has a certain capacity and has good cycle stability.

Embodiment 3

[0027] Choose simethicone oil as the raw material, measure 30mL of the raw material, place it in a porcelain crucible, put it into a muffle furnace and calcinate at 800°C for 1h. The calcined upper white substance was weighed and ground for 25 minutes, and the obtained substance was the active substance. The test method of the assembled battery is the same as that of Example 1. It is confirmed that the prepared material has a certain capacity and has good cycle stability.

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Abstract

The invention discloses a method for preparing a lithium battery anode material by calcining organic silicide. The preparation method comprises the following steps: measuring one of dimethicone, silicon tetrachloride, hexamethyldisiloxane and trimethylsilanol for later use, taking 30 mL of the above material into a porcelain crucible, placing the porcelain crucible in a muffle furnace, and calcining the material at 400-900 DEG C for 1-3 h; and weighing the upper layer white substance after the calcination, and grinding the white substance for 10-30 min to obtain a substance which is an activesubstance. The method has simple process and low price in raw materials. The prepared active substance has a certain discharge specific capacity and a good cycle stability when used in the lithium battery anode material.

Description

technical field [0001] The invention relates to a method for preparing lithium battery materials, in particular to a method for preparing lithium battery anode materials by using calcined organic silicides, and belongs to the technical field of energy materials. Background technique [0002] Lithium-ion batteries, referred to as lithium batteries, as a chemical power source with high energy density, long life, and environmental protection, have been widely used in notebook computers, electric vehicles, energy storage equipment and other fields. With the deepening of research and application, it has been found that graphite, as an anode material for commercialized lithium batteries, has greatly limited the safety of lithium batteries due to its low theoretical specific capacity and the precipitation of elemental lithium on its surface during charging. further application. Therefore, the development of new anode materials for lithium batteries has become an important research...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H01M4/60
CPCH01M4/60Y02E60/10
Inventor 丁克强赵棉石晓蜜高晓静李晨雪韩静玮
Owner HEBEI NORMAL UNIV
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